That central question of whether Baby Beecroft, as she’s known in court documents, was alive or dead when her teenage mother stabbed her 135 times will play out this week in a Washington County courtroom when several medical doctors debate the science of birth.

The trial is a fresh start for Beecroft, sentenced in 2008 to mandatory life in prison without parole on an indictment of first-degree premeditated murder. Last year, a divided Minnesota Supreme Court ordered a new trial for Beecroft, now 24, on grounds that interference from the Dakota County attorney and a medical examiner not connected with the case undermined her defense. At issue was whether other medical examiners they discouraged from testifying in her first trial could have shown that the baby was stillborn, thereby negating the murder indictment.

Prosecutor Siv Yurichuk opened the trial Monday with allegations that Beecroft had confirmed her pregnancy with a clinic but did not tell even her mother. The overweight girl succeeded in disguising the pregnancy until she delivered the full-term child in the laundry room of her mother’s house and later wrapped the body in a towel and tossed it into a trash bin outside.

“Why would anybody stab an already dead baby 135 times?” she said in her opening statement.

The emotional case won’t be presented to a jury because Beecroft requested a bench trial, meaning Chief Judge John Hoffman will decide a verdict at the end.

Defense attorney Christine Funk, told Hoffman that expert witnesses would testify that Beecroft’s baby was already dead before she inflicted wounds. That timing, she said, is the “essential question” before the court.

In a 50-minute police audio recording played in court, Beecroft described how she had given birth and said the baby was born dead. In that interview, responding to questions from investigator Groppoli, Beecroft didn’t reveal that she had stabbed the child.

“The truth is the most important thing we can get right now,” Groppoli told Bee­croft, who said again and again that she thought the baby was born dead.